Telegraph-sounder.



PATENTBD FEB. 26, 1907..

D. A. WHITNEY. TELEGRAPH sou-mm. APPLICATION TIL ED J JOV. 15, 1906.

, IIMIIH Hllll i DENN IS in general.

.ment's clear y audible. and distinct sounds,

ITNITED STATES PATE'NT- omnon.

TO WILLIAM D}. HUNTTNGTON, OF. HOLLAND, NEW YORK.

' TELEGRAPH To all whom it may concern; '7

Be it known that I, DENNIS A. WHITNEY, a citizen of the United States,residing at Holland, in the county of Erie and State of New York,have'invented certain new and useful Improvements in Telegraph-Sounders,of which the following is a specification.

, My invention relates .to improvements in telegraph-Sounders, andparticularly to the resonator or sound-ampli'iying, .device for use inconnection with telegraph instruments The manobjectjiofjmy invention isto provide means for.}ampli-fying or increasing the sound made by theordinary main-line relay, so that-the use. ocal sounder wll not benecessary and? th messages may be read direct lrolntliere Further obj'ec-of my invention are to produce a resonator for telegraph. instru. mentswhiclrmay be readily applied to the quirement s, and which will renderthe faint clicks ordinarily produced by. such instrufurther objectsbeing to produce such a device in simple and compact form thoroughlypractical and efficient.-

To attain the desired objects, tllBiilVOlltiOl'i' consists,"primarily,jof a pair of drums or resonating-cliambers between which the armatureof the telegraph instrument isadap ted to vibrate, said drums being ofsuch construction to increase or amplify the sound produced by suchvibrations, and. the inventlOIl further comprises certain other novelfeaturcsfof construction, combination, and arrangement oi" parts,substantially as herein set forth.

Specification of Letters Patent.

Application filed November 15.1906. Serial No. 243,553.

Figure 1 is a side elevation ol" my invention as applied to the iannharand well-2 known type of. telegraph instrument known asthe main-linerclay.: Fig. 2 is a front end elevation 01"" the same. Fig. 3 is a topplan view ofthe instrument with my improvements. Fig. 4 is alongitudlnal sectional view of the complete apparatus, and Fig. 5 is asectional View taken through one of the resonating-chambers on line 5 5of 9' Fig. 4. i

The main-line relay illustrated in the acconu mnying drawiws is of theusual and ordinary construction, comprising a base 1, at

i either with res-pet -SOUNDER.

' Patented res. 26,1901.

pair of magnets 2, a bracket 3 for supporting the. forward end of themagnets, an armedtii're 4E, pivoted to vibrate in close proximity to thepoles of said magnets, a post 5, a spring-adjusting bar 6, adjustablysecured in the post, a retractile spring 7, connected to the armature,and a thumb piece or member'S "for adjusting the tension oftheretractile spring. The rear ends of the, magnet's lare connected byla yoke 9, from which extends the bolt 10. A supporting-post 11 ismounted near the end 'ot the base, and through an opening provided forthat purpose in .the post is passed the bolt 10, a thumb-nut 12 being'mounted upon the end of the bolt and a spiral spring lfi beinginterposed bet-ween the supporting-post and magnet-yoke, therebyallowing the magnets to be moved toward AhWHITNEY, or HoLLANnNEW YORK,ASSIGNOR or ONE-HALF.

or away from the armatiu'e by manipulating the thumb-nut.

The support for my resonator attachment comprises a rod or spindle1-4,wln-ch is threaded for a-consit'lerable portion of its length and issupported in a horizontal position or parallel with respect to the base.Inthis instance l have shown this red as provided with an angular bentportion 15 ,'which issecured in the upper end of ti .e su jiporting-post11; but thisrod may be supported upon the base in any other suitablemanner. Mounted upon and freely movable on the threaded portion of thered are a pair of bell-shaped or hemispherical drums or sl':,ells'-l6,their open ends facing each other and inclosed bythe (Iiaphragms 17 thehubs or sleeves l8 beinginclosed within the shells and connecting-thediapln'agmsand back of the shell. Thumbnuts 19 are engaged upon therodiand form abutme; s for the outer faces ofv the shells, and a spn20,,li'il6lPUS6tl between the ad.- jaceizt faves or Uiephragms of theshells. forcesthe shells in e :gement with the ad justing-nuts. The aju-r'o is caused to vibrato between ti striking the diaphragn'is cleach.,'and 1t vill be see-nthat by these means of the tlnunb-uuts theshells or resonators may bcadjusted upon the spindle t'ocachother orwith respect to the armature,

The shells orresol11tiling-chambers may be f made 'o'f any suitablen'u-iterial st1cl1 as 1 metal, hard rubber, woo'd,.,. c;c.and thensestrument aiid iendefsthe same very clear and distinct. 1

From the foregoing description, taken in connection with the drawings,it will 'be evident that i have accomplished all the-ohjects herein setforth and have produced a.

practical resonator for telegraphic instru- V ments.

' stniinent having, a vibrating armature, of a support,resonating-shells arranged fon said support on each sue of the armature,means Having thus described my invention, what 4 Iclaim is y,

'1. -Th6C0 1T1b1I1at 1OIi with a telegraph .m- 8311111161113, of a pairof. spaced resonat'ois mounted upon said instrument and adapted to becontacted by the armature thereof and tension'means for spacing Isaidresonators.

2 The combination with atelegraph in stru nent having a vibratingarmature, of r'esonatin'gshells supported on each side of the armatureand adapted to be contacted thereby means forchanging the osition of theshells, and automatic means '01 spacing A the shells at the properdistance apart.

The coinhinationwith a telegraph infor in 'epen('.ently adjusting'theshellson the support wi th,1espect to each other, and ten"- .sion meansforspacing the shells.

a." "The eonfbinationw ithaniiagnet and armature, of a support, drumsarranged on the su ort on eppesite sides at the armature,-

meansforspaei g the drums, anilfineans for shifting the drums on thesuppoitL- 5. The comf nat on with a magnet and ar mature, of a support,resonating-shells an.

ranged on the support a spacing s ring be tween the shells, and meansfor shi iting the shells on the support.

The combination with atel'egraphinstrument, oi a supportmounted.Jthempn,

hollowdiu'ms aerang'ed on said support, ad-

justable'ahutments on said su orts en a ing the" outer faces of thedrums, and-spacing;

means interposedbetween the. drums.-

witnesses. .o a

I DENNIS A,.WHITNEYL .Wit ne sses: v I

G. E. MERR LL, CHARLES WAGNER.

